Filter



FIG. 1 is a perspective view obliquely from the front of an embodimentof a filter, showing my new design;

FIG. 2 is perspective view obliquely from the rear thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a side view thereof; and,

FIG. 6 is a top/bottom view thereof.

CLAIM The ornamental design for a filter, as shown.